This mission opens up after meeting Sir Hammerlock in "Cleaning Up the Berg" and isn't too complex, merely requires you to clear two different nests of Bullymongs.
|Normal||True Vault Hunter|
|Gear:||Assault Rifle||Assault Rifle|
The first nest is almost directly under you in a little crevice. There's a small bridge that spans over it. While you could try and drop down, it's quite a fall and you don't want to start off the fight having taken damage.
This nest starts out with a group of four Monglets. These shouldn't be any trouble for you at this point considering the experience you have with the Bullymongs. After you kill most or all of these, however, two Brat Bullymongs will appear and attack you. There's not a whole lot of room to the side and if you're not paying attention, you could corner yourself. After all the Bandits you just killed, you should have plenty of pistol ammo, however, so feel free to just unload into them with rapid fire.
To get to the second location, come out of the crevice and then run past both Sir Hammerlock and Claptrap. This should take you past a small water tower and to a frozen graveyard. On top of the extra Bullymongs (and more of the tougher variety), you'll also two new types of Bullymongs called the Bullymong Slinger and the Adult Bullymong. The Adult Bullymong is simply stronger, faster, tougher (and bigger) than the others will the Bullymong Slinger is capable of throwing more rocks (usually two at a time) and prefers to do so over getting close. This makes him a difficult enemy when paired with other Bullymongs because if you don't keep moving, you'll keep getting hit from the side or back by rocks as you try to deal with enemies from the front.
You'll encounter at least five Bullymong total: two Adults, two Monglets and a Slinger. If you back track up to near the water tower, you can draw the melee Bullymongs away from the Slinger which should put you in a more comfortable position. Deal with them and then head back for the Slinger. He's actually fairly easy when he's alone. You merely have to side step and shoot to kill him. You may not want to do this however since this can be a great chance to do your Hurly Burly challenge. Just unload a few shots at each rock. Once you've done a few, you'll likely get the hang of it and only need one or two shots per rock. Once you're done (or done enough for now), kill him and report to Sir Hammerlock to finish the mission.